<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <h2>用户登录</h2>
    手机号；<input type="tel" placeholder="输入手机号码">
    <br>
    密码: <input type="password" placeholder="输入六位数的密码">
    <br>
    <input type="submit" value="登录">
</body>
</html>